Try Our Apps


Avoid these words. Seriously.


[kol-uh-juh n] /ˈkɒl ə dʒən/
noun, Biochemistry.
any of a class of extracellular proteins abundant in higher animals, especially in the skin, bone, cartilage, tendon, and teeth, forming strong insoluble fibers and serving as connective tissue between cells, yielding gelatin when denatured by boiling.
Origin of collagen
1860-65; < Greek kólla glue + -gen
Related forms
[kuh-laj-uh-nuh s] /kəˈlædʒ ə nəs/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for collagen
Historical Examples
British Dictionary definitions for collagen


a fibrous scleroprotein of connective tissue and bones that is rich in glycine and proline and yields gelatine on boiling
Derived Forms
collagenic (ˌkɒləˈdʒɛnɪk), collagenous (kəˈlædʒənəs) adjective
Word Origin
C19: from Greek kolla glue + -gen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for collagen

structural protein of connective tissue, 1843, from French collagène, from Greek kolla "glue" + -gen "giving birth to" (see -gen).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
collagen in Medicine

collagen col·la·gen (kŏl'ə-jən)
The fibrous protein constituent of bone, cartilage, tendon, and other connective tissue that converts into gelatin by boiling.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
collagen in Science
Any of various tough, fibrous proteins found in bone, cartilage, skin, and other connective tissue. Collagens have great tensile strength, and provide these body structures with the ability to withstand forces that stretch them. Collagens consist of three polypeptide chains arranged in a triple helix, and are bundled together in fibers. When boiled in water, collagen is converted into gelatin.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for collagen

Difficulty index for collagen

Most English speakers likely know this word

Word Value for collagen

Scrabble Words With Friends